Metallic cover for boxes, tins, flasks, and like articles



March 27, 1934. E. BIFFI 1,952,487

METALLIC COVER FOR BOXES, TINS, FLASKS, AND LIKE ARTICLES Filed Nov. 28, 1930 L E IN VEN TOR. yaw/ wb A TTORNEYS.

Patented Mar. 27, 1934 UNITED STATES PATENT OFFICE METALLIC COVER FOR BOXES, TIN S, FLASKS, AND LIKE ARTICLES Egisto Biffi, Milan, Italy Application November 28, 1930, Serial No. 498,854 In Italy August 11, 1930 1 Claim. (Cl. 22054) This invention relates to the special construcwithin the other and preferably made at the same tion of a container, wherein the cover or lid is time in one operation. In order to ensure the secured to the body of the container by collars tight closure, the top edge 10 of the container 1 is rolled into both members and there is provided on flanged inwardly and engages in an annular the flange of the cover a rip strip which is limgroove 11 in the cover 2 wherein if necessary a 5 ited by a weakening groove. The novelty of the packing material 9, such as rubber, may be proinvention resides in the fact that a connection vided (Figure 3). with such a designed container, the notched or The strip 3 to be removed from the flange 3 grooved weakening channel is provided in the is limited by an annular weakening groove 4 upper part of the flange on its inner surface. The located medially of the upper and lower edges of 5 object thereof is to effect a direct removal of the and on the inner surface of the collar 8'. In rip strip in the upper part or summit of the order to facilitate the removal of the strip, it is cover flange whereby a flanged cover with a bearinterrupted by a transverse slot 5 and provided at ing edge remains which when the container is one end with a tongue 6 w e e a h 7 i p eopen efiects by its own weight a tight closure of vided for the insertion of an instrument Win 7 the container. The direct removal of the rip the f o a ring, metal thread, 0rd or the l ke strip is ensured because the curved edge remain- When the tongue 6 is pulled, the strip 3' is deing on the cover offers a great resistance to the tached or removed to leave the upper half of forces resulting from the bearing off and these he co ar 8' Which cooperates With the rolled go forces become eifective only in the upper part of collar 8 on the body to form a secondary seet- 75 summit of the cover flange by the flange of ing a d ub n a sealing p the containers body engaging in the cover flange. In Vi w f h foregoing ip i it is e- Containers of the first named type are known lieved that a further detailed description is enwherein the weakening channel i provided on tirely unnecessary. Likewise it is believed that the upper edge of the cover collar or flange but the advantages of the invention Will be readily 80 this arrangement does not prevent a displacement pp it of the weakening channel. A cover is also not a I Claim obtainable which can be subsequently placed on In a metallic closure of the character described, the collar of the containers body d thereby the combination with a container provided near produce a good closure, its upper edge with an outwardly rolled annular It is also known to provide the notch or groove collar, of a cover having a p d g flange p o.- in the upper part of summit pf th cover ll vided near its lower edge with a complemental but without the simultaneous arrangement of a rolled Collar for snug e a e t about the rolled counter-collar engaging in the aforesaid collar. 001191! On the body in such manner as to 0015 35 This construction of the container has also the the Cover 011 the Container, the inner surface above-mentioned drawbacks which are obviated the rolled c ar on the flange of the cover being, by th present i ti provided with a weakening groove extending en- 'Ihe invention is shown by way of example in tirely throughout the inner p phery and medith drawin i h1 h; ally of the upper and lower edges thereof to pro- I 40 Figure 1 is a side elevation partly in section V a 10Wer rip strip portion, said p p of one form of t ti portion-having a slot extending from the free Figure 2 shows a similar view of the same con- Outer edge which interrupts h s e, and a structional form with the rip strip being removed, tongue extending from the rip t p P t on adand jacent one edge of the slot to facilitate the re- 45 Figure 3 is an enlarged d t il i w, moval of the strip and permit removal of the Similar characters of reference designate corcOverresponding parts throughout the several views. S O IFFI.

Referring now more particularly to the drawings there is provided a tin container 1 which 60 may have any desired shape and is closed by a 106 cover 2. A tight connection or joint between cover and container is produced by providing the body of the container and the depending flange 3 of the cover 2 with interengaging annular mem- 7 n5 bers in the form of rolled collars 8, 8' fitting one a 110 

